Near the end of this command's output you should see the audio stream, e.g.:ĭuration: 00:04:19.47, start: 0.000000, bitrate: 1261 kb/s Replace myvideo.mp4 with the video filename (and path if the video is not in the current folder). To extract the audio from a video, and keep the original audio format, the first thing you'll want to do is check what's the original audio format so you know what file extension to use, by using ffprobe (part of the FFmpeg package): Optionally also install libmp3lame for converting to mp3, and libvorbis for converting the extracted audio to Ogg Vorbis. To use the FFmpeg examples / commands below, you'll need to have FFmpeg installed on your system. Enjoy.This article explains how to use FFmpeg to extract the audio stream from a video, either without re-encoding (keeping the original format), or converting the resulting audio file to CBR (constant bitrate) or VBR (variable bitrate) MP3 or Ogg Vorbis. Now that you have extracted the audio stream, you can do anything you wish with it. You can now use ffmpeg again to show that audio.ac3 only contains the ac3 audio stream. rw-r-r- 1 username gmendoza 250M 09:47 audio.ac3 The output below shows that this stream is about 250Mb. Video:0kB audio:255799kB global headers:0kB muxing overhead 0.000000% The following command will extract the AC3 audio stream to a file called audio.ac3.įfmpeg -i video.avi -acodec copy audio.ac3 Stream #0.1: Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/sĪt least one output file must be specified Stream #0.0: Video: mpeg4, yuv420p, 672x576 (snipped for brevity) Just use ffmpeg without any output options, and you can see there are two streams (0.0 and 0.1), the second is AC3 audio.ĭuration: 01:17:57.64, start: 0.000000, bitrate: 1587 kb/s The following example shows how to identify the available audio streams of the file video.avi. If you have a source video file encoded with an AC3 Dolby Digital audio stream, you can extract the audio in it’s native format using FFMpeg. Posted by admin on Februunder Tech Tips | Be the First to Comment

Ffmpeg extract audio as mp3